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This paper examines the effect of pressure on the angular-dependent magnetoresistance and Shubnikov–de Haas (SdH) oscillations in the organic conductor beta”-(ET)(TCNQ), where ET and TCNQ represent bis(ethylenedithio)tetrathiafulvalene and tetracyanoquinodimethane. At 0 kbar, three anomalies in the interlayer resistance are observed at approximately 174 K, 72 K, and 22 K. Below 22 K, both Yamaji oscillations and a periodic dip structure, caused by a commensurability effect, are seen at high magnetic fields. When the pressure increases to 2.0 kbar, the first anomaly is suppressed, and the other two shift to lower temperatures, with similar oscillations and dip structures remaining below 22 K. At 5.1 kbar, the third anomaly disappears, and only the dip structure is observed, indicating it is due to a commensurability effect between a possible 4kF charge-density wave in the TCNQ layers and the interlayer lattice potential. No Yamaji oscillations are detected at 5.1 kbar, but a higher SdH frequency suggests a magnetic breakdown orbit in the undulated Fermi surface from the ET layers. The study establishes the temperature-pressure phase diagram of beta”-(ET)(TCNQ) based on resistance measurements.

権利情報:

• In Copyright
  ©2024 The Physical Society of Japan (J. Phys. Soc. Jpn. 93, 094708, 10.7566/JPSJ.93.094708)

キーワード: 角度依存磁気抵抗振動

刊行年月日: 2024-09-15

出版者: Physical Society of Japan

掲載誌:

• Journal of the Physical Society of Japan (ISSN: 00319015) vol. 93 issue. 9 094708

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4709

公開URL: https://doi.org/10.7566/jpsj.93.094708

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更新時刻: 2024-09-10 14:22:29 +0900

MDRでの公開時刻: 2024-09-10 16:30:57 +0900